Electric coil and method of producing same.



PATENTED JUNE 16, 1908.

I. KITSEE. ELECTRIC COIL AND METHOD OF PRODUCING SAME.

APPLICATION FILED FEB-.11. 1907.

3 SHEETS-SHBBT l.

INVENTOR ATTORNEY PATENTED JUNE 16, 1908.

I. KITSEE. ELECTRIC 0011, AND METHOD OF PRODUCING SAME.

APPLICATION FILED FEB. 11, 1907.

3 SHEETSSHEET 2.

INVENTOR IPATENTED JUNE 16, 1908,

I, KITSEE. ELECTRIC COIL AND METHOD OF PRODUCING SAME.

APPLICATION FILED FEB. 11. 1907.

3 SHEETS-SHEET 3.

lNVENTO/RW ATTORNEY ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC COIL AND METHOD OF PRODUCING SAME.

Specification of Letters Patent.

Patented June 16, 1908.

Application filed February 11, 1907. Serial No. 356,795.

T all whom. it may concern:

Be it known that I, Ismon KrTsEE, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented. certain new and useful Improvements inElectric Coils and Methods of Producing Same and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to improvements in electric coils and the methodof producing same, and it has for its object to provide a coil of thischaracter constructed of a plurality of strips properly insulated toform the requ1site number of windings, in contradistinction to theemployment of insulated. wire, each strip bearing a definite relation tothe others, and so connected to the contiguous strips as to form acontinuous path for the current throughout the diameter of the coil.

A further object of the present invention is the provision of a coil ofthe character mentioned the windings of which are formed from a singlestrip of metal slitted to provide the necessary lengths to form therespective c011- volutions, the convolutions being subse quentlyconnected in series, and thus forming a continuous path for the flow ofthe current from one end of the coil to the other.

Having these general objects in view, and others that will appear as thenature of the improvements is better understood, the invention consistssubstantially in the novel construction, combination and arrangement ofparts hereinafter fully described, illustrated in the accompanyingdrawings, and pointed out in the appended claims.

In the drawingsFigure 1 is a perspective view illustrating the manner offorming the conductors employed in connection with the production of theherein-described coil. Fig. 2 is a plan view of the slitted metallicsheet. Fig. 3 is a similar view illustrating the sheet shown in Fig. 2as mounted upon a backing of insulation. Fig. 4 is a view similar toFig. 3 illustrating the formation of one end of the backed sheetadapting the same for application to a bobbin for the construction ofthe coil. Fig. 5 is a transverse sectional view thereof. Fig. 6 is a lanview illustrating the sheet formed as disclbsed in Fig. 4 applied to abobbin preparatory to winding the sheet thereon. Fig. 7 is a sideelevation of the coil after the sheet has been wound thereon and in thefinishing stages of construction. Fig. 8 is a side elevation of thecompleted coil.

Referring in detail to the drawings, and more especially to Fig. 1, thenumeral designates a roll having a sheet of metal wound thereon, saidsheet being designated by the numeral 21, and from said roll 20 thesheet 21 is led to a slitting roll 22 that cooperates with a cylinder23, and through the medium of which the sheet 21 is formed into a seriesof narrow strips 24. After leaving the rolls 22 and 23 the strips 24formed thereby are caused to pass between a pair of compressing rolls 25between which rolls also passes a web of insulating material 26 that iscarried by a roll 27, and from which latter the web 26 is led throughthe rolls 25 at the under face of the strips 24. here to the under sidesof the strips 24 by any suitable medium, such as cement, and afterleaving the rollsT2 5 tlfe combinorl strips and web are wound upon areceiving roll 28. From this roll 28 any desired length of the combinedstrips and insulating web may be taken in accordance'with the size ofcoil that it is desired to produce, but by referring to Figs. 2 and 3 itwill be noted that in slitting the sheet 21 the same commences and endsat a point slightly remote from the ends of the sheet so that theextremities of the strips 24 may be held intact, and thus preserve therelative arrangement of the strips until it is desired to fully separatethe same for the production of the coil.

To form a coil from the conductors pro duced as above described one endof the sheet 21 is slitted in order to separate the strips 24 at thatparticular end, and when this has been accomplished the strips aredivided and an equal number preferably bent in opposite directions, andat right angles to the bodies of the strips, as clearly shown in Fig. 4,in which position it will be seen that the web of insulation liesbetween the bent back ends of the strips and the bodies thereof. Afterthe ends have been positioned in this manner the same are placed upon abobbin 29 forming the core of the coil, said bobbin being provided withheads 30, which latter form the ends of the coil, and the strips 24 arethereupon wound around the bobbin to the desired depth, and to impart tothe coil the requisite diameter. hen this has been accomplished theouter ends of the strips 24 are cut so that each successive strip, com-The web 26 is caused to ad-.

mencing at the central portion thereof, is slightly less in length thanthe immediately adjacent one, as clearly seen in Fig. 7. By so cuttingthe strips 24- it is manifest that the outer ends thereof will be in aposition to be overlapped by the inner ends which have been permitted toproject, and these projecting inner ends are thereupon bent down uponthe exposed outer ends, in a manner as clearly seen in Figs. 7 and 8,and the ends are securely fastened together, as by soldering. In thisconnection, however, it is to be noted that the projecting inner end ofeach strip is connected to the exposed outer end of the next immediatelycontiguous strip. This will be readily appreciated from the designationsof the respective strips, to which con secutive numerals have beenapplied, the strips being designated from 1 to 14, and in connecting theprojecting inner ends with the exposed outer ends, the inner end ofstrip No. 1 is connected to the outer end of strip N o. 2 the inner endof strip No. 2 is connected to the exposed outer end of strip N o. 3,and this continued throughout the entire series of the stripsconstituting the full winding of the coil. Thus the respective stripsare connected in series, and a continuous path provided from one end ofthe coil to the other. It will be observed, however, that the outer endof strip No. 1, and the exposed inner end of strip No. 14 remainunconnected, and these strips constitute the ter minals of the coil toenable the latter being connected to a circuit.

From the foregoing description it will be seen that an exceedinglysimple but efficient coil is provided; that each strip constitutes awinding of the coil and bears a definite relation to the others, andthat in connecting the strips in the manner described a continuous pathfor the :flow of the current is provided from one end of the coil to theother.

Having thus described the invention, what is claimed as new and desiredto be secured by Let 'ers Patent, is: r

1. An electric coil, comprising a series of strips, said strips forminga series of independent windings insulated from each other, the innerend of each of said strips being connected to the outer end of the nextcontiguous strip to provide a continuous path for the flow of thecurrent through the coil.

2. An electric coil, comprising a series of strips, each of whichconstitutes a separate winding, and an insulating web mounted upon'oneface of said strips and serving to insulate the convolutions of thewindings from each other, the inner end of each of said strips beingconnected to the outer end of the next contiguous strip to provide acontinuous path for the flow of the current through the coil.

3. An electric coil, comprising a series of strips each of whicheoi'istitntes a separate winding, and. an insulating web monntml uponone face of said strips and serving to insulate the convolutions of thewindings from each other, the inner ends of the strips over lapping theouter ends thereof and each. con nected to the next contiguous strip toprovide a continuous path for the lion of the current through the coil.

4. An electric coil, con'iprising a core, and a series of independentwindin arranged in sheet form wound upon said core, said windings beinginsulated from each other, the in ner end of each of said windings beingcon nected to the outer end of the next contignous winding to provide acontinuous path for the flow of the current through the coil.

5. An electric coil, comprising a bobbin forming the core of the coil,and a series of independent windings arranged in. sheet form wound uponsaid core, said. windings being insulated from each other, the inner endof each of the wirnlings being conne ted to the outer end of the nextadj accnt winding to provide a continuous path for the flow of the en1'- rent through the coil.

6. The method of producing an electric coil, which consists in windingin coil form. a sheet of insulating material having thereon a series ofindependent coruluctors, and. then. connecting the latter in series asto .xach. other.

7. The method. of producing an electric coil, which consists in windingin cenvolntc form a sheet of insulating material having at one of itssides a series of independent eonductors, the convolutions of theinsulating material separating the convolutions of the conductors, andthen connecting the lati or in series as to each other.

In testimony whereof I affix my signature, in the presence of twowitnesses.

lSlDOlt .lillilS F) l).

Witnesses:

EDITH R. S'rrLLnY, :MARY (1 SMITH.

